That's true. Kyrie is a top 10 player at best. Which is good, but not championship worthy. The east alone has 3 players ahead of Irving (Giannis, Kawhi, Embiid). Add in the west with Curry, Durant, George, Westbrook Harden, Jokic, Dame (on par).
The only way I am ok with giving Kyrie the max is if he comes with Davis (at this point I'd take him without assurances) or Durant. Otherwise you can let him walk and retool on the fly (no rebuild). The NBA is such a top heavy game where the superstars usually win. List since 96 is like: Jordan, Duncan, Shaq, Wade, Garnett, Kobe, Nowitzki, Lebron, Kawhi, Curry, Durant
With the exception of the 2004 Pistons and maybe Wade everyone else on that list was a true top 5 player (at that time). So it takes a huge amount of luck to win with a player like Kyrie, it basically does not happen (even Curry was somewhat lucky without Durant.)
Unfortunately our #1 does not match up with the other 1's as I stated above and our secondary stars don't match up well with other secondary stars. Tatum has not made a huge leap as hoped and Brown in general just isn't that good to begin with. And Hayward needs more time to recover. Al is still pretty good, though.